杂种小麦生育规律的研究 Ⅱ杂种小麦籽粒的灌浆规律

A STUDY ON THE GROWTH AND DEVELOPMENT OF THE HYBRID-WHEA Ⅱ On the grain filling of hybrid wheat

观察3个杂种组合籽粒灌浆过程的结果表明,杂种小麦在开花至成熟的全过程中,籽粒鲜量、干重、含水率的变化以及含氮物(蛋白氮、非蛋白氮、粗蛋白氮)的累积总趋势与常规品种相仿;千粒日增量在灌浆主期结束前,杂种<常规种;仅在灌浆副期杂种>常规品种;穗粒重杂种>常规品种。

The sample spikes in-bloom on the same day were chosen and a number of them were picked at the fixed times to contraot with conventional wheat in the control experinent, The process of the grain filling of three hybrid societies was observed in the research. The experiment shows that chang of fresh weight, dry weight and percent moisture content and the process of the nitrogenous compound (protein nitrogen, nonprotein nitrogen, crude protein) accumulation of hybrid wheat are much similar to conventional wheat, and the difference of the hybrid and the conventional lies in daily weight increase per thousand kernel of the hybrid wheat large than that of the conventional wheat in the final watery stage, accordingly, the hybrid wheat does not shows obvious advantage in kernel weight; but grain weight per spike of the hybrid wheat is larger than that of the conventional wheat because there are more grains in the hybrid wheat spike. The experiment also shows that the hybrid societies differ in grain weight and nutrient quality, which not only provides the opportunity to choose the better varieties, but also makes it too simple to decide whether a variety is better or not by evaluating a certain charcter. Therefore, exploiting excellent hybrid society still is a approach to increase wheat unit yield.